Maurilloides Pitts & Shimizu, 2021

Shimizu, Akira, Pitts, James P, Rodriguez, Juanita, Wahis, Raymond & Yoshimura, Jin, 2021, Systematics and convergent evolution in three Australian genera of Pepsinae spider wasps (Hymenoptera: Pompilidae), Austral Entomology 60 (2), pp. 301-316 : 9

Maurilloides Pitts & Shimizu , gen. nov.

http://zoobank.org/urn:lsid:zoobank.org:act:769CC31C-E27E- 41DF-8381-BF1C0FAA1FE5

Type species: Maurilloides nigrisoma Pitts & Shimizu sp. nov. (here designated).

Diagnosis

This genus differs from other genera of the Australian ‘Ctenocerini’ sensu Evans (1972) by the unique combination of the following female features: clypeus much narrower than lower frons, truncate apically ( Fig. 3a ); labrum fully exserted, sometimes bent backward at right angle to clypeus; lower frons laterally to antennal sockets deeply depressed; vertex moderately convex between eye tops, its upper margin chevron-shaped in frontal view; scape slightly produced apicomedially but not attaining apical margin of pedicel, with medial face flattened, smooth and polished and lateral face slightly concave ( Fig. 3b–d ); gena, in dorsal view, thinner than in Maurillus , gently receding posteriorly ( Fig. 3b ); pronotum with anterior face vertical, flattened and polished, forming right angle with dorsum ( Fig. 3e ), anterior margin of pronotal dorsum convex in dorsal view, not tuberculate submedially, barely depressed medially ( Fig. 3b ); and tarsal claws cleft ( Fig. 3f ), the condition being unique tothe Australian ‘Ctenocerini’ sensu Evans (1972).

Description

Female

Head wider than high. Vertex with posterior margin shallowly and broadly emarginate in dorsal view ( Fig. 3c ). Distance from eye tops to vertex crest, in lateral view, less than tenth of eye height ( Fig. 3e ). Frons notverybroad (MID/TFD <0.6); upper frons flattened and polished ( Fig. 3a ); lower frons, in middle, sloping downward between antennal sockets. Ocellar triangle very flat ( Fig. 3b ). Posterior ocelli at level of eye tops ( Fig. 3a ). Clypeus slightly depressed sublaterally, convex medially; lateral margin nearly vertical; apicolateral corner broadly rounded. Labrum with apical margin barely convex. Malar space very short. Mandible stout with small tooth removed from apical point on inner margin. Antenna short and slender. Gena not very thick, in profile gently narrowing above and below ( Fig. 3e ). Uppermost portion of occipital suture situated slightly below vertex crest ( Fig. 3c ). Occiput not very large, compared with in Maurillus ( Figs 1g and 3c ).

Pronotal dorsum with anterior margin convex in dorsal view ( Fig. 3b ); shoulder slightly swollen. Mesoscutum flattened, with posterolateral margin not reflexed. Discs of scutellum and metanotum flattened at same level as mesoscutum. Propodeum short and rugose on both dorsum and declivity ( Fig. 3g ); declivity completely flattened for reception of anterior face of T1, longer than dorsum, separated from dorsum by blunt carina.

Fore femur slightly thinner than mid femur. Dorsal apex of fore tibia with short stout decurved spines interiorly and exteriorly. Fore tarsomeres 2–4 combined much shorter than fore tarsomere 1. Mid and hind tibiae with short spines in three rows dorsally and ivory-white spurs. Tarsomere 5 of all legs beneath without spines.

Fore wing crossvein cu-a originating distal to point of separation of vein M + CuA, very oblique to vein A ( Fig. 3h ).

Metasoma not short, slightly broader than mesosoma ( Fig. 3i ). T1 abruptly narrowing anteriorly; anterior face vertical and flat, fitting against propodeal declivity ( Fig. 3j ). Transverse groove on S2 distinctly impressed at about basal third. T6 with several long stiff bristles. S6 slightly compressed laterally without median carina.

Male

Unknown.

Distribution

Australia.

Etymology

The generic name is derived from a morphological similarity to Maurillus . The name is considered masculine in gender.

Figures

Fig. 3. Maurilloides nigrisoma, sp. nov., holotype female.(a) Head, anterior view; (b) head and anterior part of mesosoma, dorsal view; (c) head and anterior part of mesosoma, dorsolateral view; (d) scape, dorsal view; (e) head and mesosoma, lateral view; (f) left hind pretarsus, lateral view; (g) metapostnotum and propodeum, posterodorsal view; (h) fore wing; (i) posterior part of mesosoma and metasoma, dorsal view; and (j) posterior part of propodeum and metasoma, lateral view. Scale bars: 0.1 mm for (f) and 1 mm for others.

Fig. 1. Maurillus argenticapitis, sp. nov., holotype female.(a) Head, anterior view; (b) head and anterior part of antenna, ventrolateral view; (c) head and mesosoma, lateral view; (d) head and anterior part of mesosoma, dorsal view; (e) posterior part of mesosoma and metasoma, dorsal view; (f) fore wing and anterior part of hind wing; (g) head and mesosoma, dorsal view; (h) apical part of fore tibia, dorsal view; (i) right fore tarsus, dorsal view; and (j) right hind pretarsus, dorsal view. Scale bars: 0.1 mm for (j), 0.5 mm for (h) and (i) and 1 mm for others.